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Preparation method of biomass iron coke for blast furnace

A biomass coke and biomass technology, applied in the field of metallurgy, can solve problems such as large emissions, high sulfur content in products, and large energy consumption, and achieve the effects of small investment, low content of harmful elements, and large storage capacity

Inactive Publication Date: 2018-06-29
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the large consumption of fossil energy such as coal in the blast furnace ironmaking process, CO 2 , SO 2 , NO x Issues such as large emissions and high sulfur content in products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Carbonize the dried waste wood in a carbonization furnace at 400°C for 30 minutes to obtain biomass coke (fixed carbon content ≥ 80%, volatile content ≤ 15, % ash content ≤ 2%, sulfur content ≤ 0.1%), and grind it to 3mm The following biomass coke and coking coal are mixed at a ratio of 1:9. The coking coal G value and Y value used in this example are as shown in Table 1. In addition, coal powder and iron ore powder with a particle size of less than 1mm and 5% of the total mass of biomass are added. .

[0026] Table 1 Coking coal index

[0027] coal type

G

Y / mm

coking coal

77.8

18

[0028] Mix the ingredients evenly, then send the mixture into the tamping machine for tamping until the bulk density is 1.05t / m 3 , send the tamped briquettes into the carbonization chamber of the coke oven for coking, when the central temperature of the mixture is heated to 900-1100°C and keep for 4 hours, the coke is discharged, the coke is quenched by w...

Embodiment 2

[0031] Carbonize the dried peanut shells in a carbonization furnace at 500°C for 25 minutes to obtain biomass coke (fixed carbon content ≥ 80%, volatile content ≤ 15, % ash content ≤ 2%, sulfur content ≤ 0.1%), and grind it to 3mm The following biomass coke is mixed with coking coal, fat coal and gas coal at a ratio of 1:4:2:2. The indicators used for the G value and Y value of coking coal, fat coal and gas coal used in this example are shown in Table 2. In addition, pulverized coal and Iron ore powder and blast furnace dust with a total mass of 6% of biomass and a particle size of less than 1mm.

[0032] Table 2 Indicators of coking coal, fat coal and gas coal

[0033] coal type

G

Y / mm

coking coal

77.8

18

Fat coal

92

27

gas coal

79.5

14

[0034] Mix the ingredients evenly, then send the mixture into the tamping machine for tamping until the bulk density is 1.06t / m 3 , send the tamped briquettes into the carbonizati...

Embodiment 3

[0037] Carbonize the dried straw in a carbonization furnace at 600°C for 20 minutes to obtain biomass coke (fixed carbon content ≥ 80%, volatile content ≤ 15, % ash content ≤ 2%, sulfur content ≤ 0.1%), and grind it to less than 3mm Biomass coke is mixed with coking coal, fat coal, gas coal and 1 / 3 coking coal in the ratio of 2:2:1:1:1. The G value and Y value of coking coal, fat coal gas coal and 1 / 3 coking coal used in this example are used The indicators are shown in Table 3, plus red mud, converter dust and blast furnace ash with a total mass of pulverized coal and biomass of 8 and a particle size of less than 1 mm.

[0038] Table 3 Indexes of coking coal, fat coal, gas coal and 1 / 3 coking coal

[0039] coal type

G

Y

coking coal

77.8

18

Fat coal

92

27

1 / 3 coke

93.6

17

gas coal

79.5

14

[0040] Mix the ingredients evenly, then send the mixture into the tamping machine for tamping until the bulk density i...

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Abstract

The invention discloses a preparation method of biomass iron coke for a blast furnace. The iron coke has the characteristics of high reactivity and high strength, and has a certain protective effect on original large blocks of coke, and meanwhile, the breathability of the blast furnace is maintained; the emission amount of CO2 can be reduced, and the production of the blast furnace can also be ensured; the iron coke prepared by the preparation method is low in energy consumption and low in investment; biomass coke is taken as a main raw material; the biomass coke is large in storage capacity and can be renewed, so that reasonable utilization of resources can be realized; the production cost is low; meanwhile, the problem that iron-making industry relies heavily on fossil energy is solved;according to the method, carbon-containing pellets can be produced, and dust, such as converter dust, blast furnace mash gas dust and sintering machine head dust, of an iron and steel plant can also be recycled; the production cost is reduced. The biomass components are superior to those of coal ash; clean production can be realized; energy conversation and emission reduction can be realized; low-sulphur low-phosphorus final products are obtained.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a preparation method of biomass iron coke for blast furnaces. Background technique [0002] Biomass energy is a renewable green carbon source with the advantages of wide distribution, cheap and easy access, rich resources, and carbon neutrality. Compared with traditional pulverized coal energy, it has great economic, environmental and social benefits. Biomass has excellent characteristics such as low content of harmful elements, low pyrolysis temperature, and high reactivity. It is suitable for use as a heating agent or reducing agent in ironmaking processes, and can play a role in replacing coal and coke, saving energy and reducing emissions. If it is properly applied to the ironmaking process, it will definitely bring about technological innovation and cost optimization in iron and steel production. [0003] Iron coke is a kind of highly reactive coke. It is mad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B53/04C10B53/08C10B57/06
CPCC10B53/00C10B53/04C10B53/08C10B57/06
Inventor 姜喆车玉满郭天永孙鹏姚硕陈国一王超庞克亮武吉马金峰
Owner ANGANG STEEL CO LTD
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